5m Zen
Xy 2 yx dx x
Xy 2 yx dx x pictures 5
Home
>
Xy 2 yx
Xy 2 yx dx x
xy 2 x dx yx 2 dy 0
x^2y x^2 dy(y^2 x y^2)dxu003d0
xy 2 yx dx x xy 1 dy 0
